Strategize the agility of project execution.
Once you have analyzed the impact of different variations during the immerse phase, you can create the initial plans for the rest of the project. Most of these plans are live documents that are kept updated during rest of the stages.
You can plan the product development, implementation, operations without losing the ability to respond to market dynamics. It’s important to understand, this is NOT about making a 'Big Plan Upfront', but base planning documents that can facilitate continuous planning throughout the lifecycle.